EP0908089B1 - Ballendichteregeleinrichtung für Ballenpresse - Google Patents

Ballendichteregeleinrichtung für Ballenpresse Download PDF

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Publication number
EP0908089B1
EP0908089B1 EP98203318A EP98203318A EP0908089B1 EP 0908089 B1 EP0908089 B1 EP 0908089B1 EP 98203318 A EP98203318 A EP 98203318A EP 98203318 A EP98203318 A EP 98203318A EP 0908089 B1 EP0908089 B1 EP 0908089B1
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EP
European Patent Office
Prior art keywords
crop material
charge
control system
baling chamber
density control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP98203318A
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English (en)
French (fr)
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EP0908089A1 (de
Inventor
Dirk G. C. Leupe
Christiaan A. C. Lippens
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CNH Industrial Belgium NV
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New Holland Belgium NV
Ford New Holland NV
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Publication of EP0908089A1 publication Critical patent/EP0908089A1/de
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01F—PROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F15/00—Baling presses for straw, hay or the like
    • A01F15/08—Details
    • A01F15/0825—Regulating or controlling density or shape of the bale

Definitions

  • the present invention relates generally to an apparatus and a method for controlling the density of packages of crop material formed in the baling chamber of an agricultural baler, and more particularly, to an apparatus and a method involving means for sensing the force applied on said packages and means for sensing the introduction of new charges of crop material into this baling chamber.
  • the invention has particular application to the interruption of the normal operation of the density control system under conditions when no charges of crop material are fed into the baler, as on headlands or when the baler is halted on the field.
  • Conventional agricultural balers comprise a frame which is travelled on a pair of wheels over a field for picking up therefrom hay, straw or silage grass and feeding such crop material to a baling chamber in which it is compressed to parallelepiped packages under action of a plunger which reciprocates inside the baling chamber.
  • a tying mechanism is operated to encircle the completed package with a plurality of strands and to knot the strands ends together to form a finished bale which will be ejected out of the baler.
  • the baling chamber comprises at least one movable wall section whereof the position can be adjusted to modify the transverse cross section of the baling chamber and thereby vary the resistance met by the reciprocating plunger when a new charge of crop material is introduced into the chamber and thrust against the package. It is well known in the art to equip the movable wall section with actuator means to automatically adjust its position in response to load sensor means sensing the actual force by which the material in the baling chamber is compressed in order to adjust the density of the package to a predetermined value.
  • the restricted chamber may cause such resistance to the movement of the package that the blow of the plunger on this charge effects unacceptable stress on the structure and ruptures part of the baling mechanism.
  • Important damage to the baler may be precluded by providing the drive line of the plunger with shear bolts which break and disconnect the plunger from the tractor drive line whenever such extraordinary forces are encountered.
  • shear bolts are satisfactory for dealing with unforeseeable force peaks, but they will only cause frustration when used for coping with the more frequent effects of force amplification on or after turning the baler on headlands.
  • the normal operation of the bale density control system may be interrupted by a control valve which is operated by the stuffer mechanism.
  • the valve precludes that pressurized oil is fed to the hydraulic actuator of the movable wall portion.
  • Such system only works satisfactorily in balers having a stuffer mechanism which is operated in response to a complete filling of the feeder duct. Otherwise the system would not distinguish between conditions wherein new charges are introduced into the baling chambers and others wherein the stuffer mechanism is working idly. It requires a reliable sensor for assessing a complete filling of the duct further in order to preclude inopportune adjustment of the baling chamber.
  • a density control system for an agricultural baler which comprises:
  • Said density control system is characterized in that said charge sensing means are operable to sense the passage of a newly introduced charge of crop material along at least one wall portion of said baling chamber.
  • control system can distinguish between peak loads caused by the impact of the plunger on a new charge of crop material and peak loads caused by the impact on an expanding face of the package in the baling chamber. Only in the first case an adjustment of the cross section of the baling chamber may be required.
  • the load sensing means may be associated with the drive line of the plunger to measure the force applied by the plunger on the package, or with a wall of the baling chamber in order to measure the force applied by the package on this wall.
  • the control system may comprise means for precluding actuation of the actuator means when no passage of a new charge of crop material has been sensed. In this manner it is prevented that the cross section of the baling chamber is changed in response to the peak loads which occur when the plunger hits the expanding face of a crop package in the baling chamber.
  • these precluding means may be operable to preclude any movement of the movable wall section. Such system stabilizes the baling chamber while the baler is running idle on the headlands and prevents that the low forces encountered by the plunger engender an unwanted restriction of the section of the baling chamber.
  • the precluding means may enable the control of the actuator means in response to the output of load sensing means for a fixed time interval.
  • Further means may be provided for enabling an increase in density of the package under conditions that said charge sensing means have sensed a new introduction of crop material into the baling chamber.
  • These means may comprise a hydraulic control valve providing pressurized oil to another control valve which is connected to a hydraulic cylinder which positions the movable wall section.
  • the charge sensing means sense the movement of a pivotable member, such as a hay dog, which extends through a wall portion of the baling chamber.
  • a method for controlling the density of packages of crop material in an agricultural baler which comprises:
  • FIG. 1 shows an agricultural baler 10 comprising a frame 11 which is equipped with a forwardly extending tongue 12 provided at its front end with hitch means (not shown) for coupling the baler 10 to a towing tractor.
  • a pick-up assembly 14 lifts windrowed crop material off the field as the baler 10 is travelled thereover and delivers such material into the front end of a rearwardly and upwardly curved, charge-forming feeder duct 16.
  • the duct 16 communicates at its upper end with an overhead, fore-and-aft extending baling chamber 18 into which crop charges are loaded by a cyclically operating stuffer mechanism 20.
  • a continuously operating packer mechanism 22 at the lower front end of the feeder duct 16 continuously feeds and packs material into the duct 16 as to cause charges of the crop material to take on and assume the internal configuration of the duct 16 prior to periodic engagement by the stuffer 20 and insertion up into the baling chamber 18.
  • the feeder duct 16 may be equipped with means (not shown) for establishing whether a complete charge has been formed therein and operating the stuffer 20 in response thereto. Each action of the stuffer 20 introduces a "charge” or "flake” of crop material from the duct 16 into the chamber 18.
  • a plunger 24 reciprocates in a fore-and-aft direction within the baling chamber 18 under action of a pair of pitman rods 25 which are linked to the crank arms 26 of a gearbox 27 driven by a transmission shaft 29 which is connected to the PTO shaft of the tractor.
  • the reciprocating plunger 24 pushes each new charge introduced into the baling chamber 18 rearwardly and forms the subsequent charges into a package of crop material, which is forced by the same action of the plunger 24 toward a rearmost discharge aperture 28 of the chamber.
  • the baling chamber 18 comprises at least one movable wall portion 30 of which the position can be adjusted to vary the cross section of the aperture 28. Reduction of this cross section will increase the resistance to rearward movement of the crop packages and hence increase the density of the crop material contained therein. Similarly an enlargement of the cross section will reduce said resistance to rearward movement and hence equally reduce the density of the newly formed packages.
  • the position of the wall portion 30 is controlled by actuator means comprising of a pair of hydraulic cylinders 31 (only one shown in Figure 1) which are installed between the frame 11 and the wall portion 30.
  • each package is securely bound in its final compacted form by a tying mechanism 32 .
  • the length of each bale produced by the baler 10 can be adjustably predetermined by conventional means not shown.
  • the tying mechanism 32 comprises a series of periodically actuated needles 33 which are normally stationed in a stand-by condition below the chamber 18 but which, when actuated, swing upwardly through and across the baling chamber 18 to present twine to a corresponding series of knotters positioned on top of the chamber 18 and extending across the width of the latter.
  • the baling chamber 18 comprises a pair of side walls 36, a top wall 37 and a bottom wall 38.
  • the side walls 36 are provided with a longitudinal slot 40 for receiving therein the bearings 41 which support the plunger 24 during its reciprocation inside the baling chamber 18.
  • the top wall 37 and bottom wall 38 are equally slotted to permit passage of the needles 33 and the twine therethrough during each tying cycle.
  • the retaining means comprise a pair of hay dog assemblies 44 mounted to each side wall 36 and a set of similar hay dog assemblies 45 mounted to the top wall 37.
  • Each hay dog assembly 44 comprises a so-called hay dog 47 constituted by a pivotable member extending through a longitudinal slot in one of the side walls 36. As shown in Figure 3, the hay dog 47 is mounted for pivotment about the shaft of vertical bolt 48 which is mounted through a pair of lugs 50 welded to the outside of the side wall 36.
  • the hay dog 47 has a forward edge 53 extending at an acute angle from the wall 36 and a rearward edge 54 extending at a substantially right angle from the wall 36 when the hay dog 47 is in its rest position shown in Figure 3.
  • the hay dog assemblies 44 are mounted at such distance from the gearbox 27 that the rearward edges 54 of the hay dogs 47 are positioned in alignment with or slightly in front of the rearwardmost position of the plunger 24 during its compression stroke.
  • the hay dogs 47 are received in a series of longitudinal slits 56 in the sides of the plunger body such that they are not engaged by the plunger 47 itself during each stroke of the plunger mechanism. Consequently, when no fresh crop material is introduced into the baling chamber 18 and the baler is running idle, the hay dogs 47 remain in their inward position shown in Figure 3.
  • the stuffer mechanism 20 introduces a new charge of crop material into the baling chamber 18, it will be engaged by the plunger 24 and shoved rearwardly along the hay dogs 47.
  • the crop material slides along the forward edge 53 of the hay dogs 47 and pushes the latter outwardly.
  • the action of the springs 51 brings the hay dogs 47 back to their rest positions.
  • the plunger 24 retracts and starts travelling forwardly again, the compressed package of crop material tends to dilate and its front face expands in the direction of the plunger.
  • the material is held back by the rear edges 54 of the hay dogs 47 on both sides of the baling chamber. Consequently the front face of the package is stabilized and the inlet opening in the bottom wall 38 will not be obturated thereby, such that further charges of crop material may be introduced into the baling chamber 18 without any hindrance thereto.
  • the hay dog assemblies 45 in the top wall 37 are similar in structure and operation and do therefore not require a further detailed description.
  • the movement of the hay dog assemblies 44, 45 is indicative of an introduction of a fresh charge of crop material into the baling chamber 18.
  • This movement is sensed by means including a switch 60, which is mounted to a vertical support plate 61 welded above the hay dog assembly 44 to one of the side walls 36 ( Figure 3).
  • the switch 60 comprises a pivotable member 62 which is engaged by the hay dog 47 when the latter is pushed outwardly by a new charge passing along this portion of the side wall 36.
  • the magnitude of the force by which the crop material is compressed is measured by a load sensor 75 which is installed inbetween the plunger gearbox 27 and the baler frame 11.
  • the reaction forces from the package in the baling chamber 18 are transmitted via the plunger 24, the pitman rods 25 and the crank arms 26 upon the gearbox 27 whereof the lower portion is bolted onto the frame 11.
  • the reaction force at the top of the gearbox 27 is measured by the load sensor 75 which hence provides an output signal proportional to the plunger forces.
  • load sensor 75 may be of the type described in EP-A-0,389,322.
  • the plunger load may also be established by a pair of wrist pins 76 which connect the rods 25 to the body of the plunger 24.
  • Such pins 76 may be hollow and equipped with shear stress sensors such a strain gauges for measuring the load on the plunger 24, as described in EP-A-0,223,350.
  • the density control system comprises hydraulic circuitry in accordance with Figure 4.
  • a continuously operated gear pump 78 takes hydraulic oil via a filter 79 from an oil tank 80.
  • the oil is fed via a pressure line 81 to a solenoid-operated by-pass valve 82.
  • this valve When this valve is in its rest position as shown in Figures 4 and 5, the oil is drained back to the oil tank 80 via a return line 83 which is provided with an orifice 84 which has a slight pressurizing effect on the oil in the return line 83.
  • the oil from the pump 78 can no longer escape via the return line 83 and pressurized oil is supplied via a non-return valve 86 and a further pressure line 85 to an inlet port of a solenoid-operated density control valve 87.
  • the corresponding outlet port is connected to a supply line 89 equipped with a manometer 88 for displaying the oil pressure in the density control circuit.
  • the supply line 89 is linked to the rod ends of the hydraulic cylinders 31 which control the position of the movable wall portion 30.
  • the control valve 87 links the pressure line 85 and the supply line 89 to a return line 90 which is connected to the return line 83.
  • the oil pressure in the pressure line 85 is limited by a pressure relief valve 91.
  • the signals from the hay dog switch 60 and the load sensor 75 or 76 are used in the density control system, which further comprises a circuit board 94 ( Figure 5) for analyzing these baler signals and energizing or deenergizing the solenoids of the by-pass valve 82 and the control valve 87 in response thereto.
  • the circuit board 94 includes a microprocessor 95, for example of the Microchip type PIC16C73, which is provided with erasable memory means into which a program can be loaded in accordance with the description given hereafter.
  • the output of the load sensor 75 is linked via a diode protected resistor circuit 96 to an analogous input pin of the microprocessor 95.
  • the hay dog switch 60 is connected via another diode protected resistor circuit 97 to the positive input pin of a comparator 98.
  • a voltage divider 99 provides a reference voltage to the negative input pin of the comparator 98.
  • the output pin of the comparator is linked to a digital input gate of the microprocessor 95.
  • Two output gates of the microprocessor 95 are connected to the input pins of two of electronic switches 100, 101, such as Smartfets of the type BTS413A.
  • the output pin of the switch 100 is connected to the solenoid of the by-pass valve 82.
  • the solenoid of the control valve 87 is connected between the voltage source V and a relay 103. At rest this relay connects the solenoid to ground such that the valve 87 is actuated and shifted to the left.
  • the relay 103 is controlled by the output of Smartfet 100. When the latter is low, the relay 103 is not actuated and the solenoid of the control valve 87 remains energized.
  • the other pin of the relay 103 is connected to the output pin of the Smartfet 101.
  • the output pin of the latter is connected to ground and the solenoid of the control valve 87 is energized to keep the valve 87 in its leftmost position.
  • the voltage source V is connected to the output pin and the relay 103.
  • the valve 87 is deactivated and returns to its rest position shown in Figures 4 and 5.
  • the program loaded into the microprocessor 95 screens the input signals from the load sensor 75 and the hay dog switch 60 and provides an output to the Smartfets 100, 101 in accordance with the description following below.
  • the microprocessor 95 monitors the input from the hay dog switch 60.
  • a graph 110 showing a typical evolution of this input is depicted in Figure 6.
  • the switch 60 closes, the voltage provided to the digital input pin of the microprocessor 95 raises from LOW to HIGH.
  • the program sets a HIGH to the output pin of the microprocessor 95 for energizing the solenoid of the by-pass valve 82.
  • the program resets this output after an interval which is slightly shorter than the cycle time of the plunger 24. This interval may be about 1.2 sec long.
  • the output of Smartfet 100 is shown in graph 114 in Figure 6. During this actuation interval pressurized oil is provided to the control valve 87.
  • the program After the actuation interval, the program resets the value at the output pin and the by-pass valve 82 is deenergized, thereby ending the further supply of pressurized oil to the control valve 87.
  • the microprocessor 95 samples the signal from the load sensor 75 at a rate of 10 KHz.
  • the program adds up the results from 10 consecutive samples and calculates their mean value to establish a new load value. Hence this value is updated at a rate of 1 KHz.
  • the evolution of the established load values is illustrated by graph 112 in Figure 6.
  • the density control program further compares the established plunger load values to a threshold value (dashed line 113) which has been selected by the baler operator. When the mean load value exceeds this threshold value, the program sets the output of the microprocessor 95 to the Smartfet 101 to HIGH in order to connect the output of the latter to the voltage source. In case the Smartfet 100 is energized already by a recent passage of crop material along the hay dog switch 60, the voltage is transferred upon the contact of the density control valve 87. The evolution of the tension at the contact of the valve solenoid is represented by graph 116 in Figure 6.
  • valve 87 returns to its rightmost position and oil from the bale chamber cylinders 31 is permitted to flow back to the oil tank 80.
  • the resulting evolution of the oil pressure in hydraulic line 89 at the outlet port of the control valve 87 is illustrated by graph 118.
  • the by-pass valve 82 and the relay 103 are enabled.
  • the load peak detected by sensor 75 de-energizes the control valve 87 and oil is permitted to flow back to the oil tank 80 via orifice 84.
  • the pressure in line 85 diminishes gradually, until the value of the measured load falls below the threshold value (113).
  • the control valve 87 is reactuated and the pressurized oil is pumped to the cylinders 31.
  • the by-pass valve 82 returns to its rest position and no more oil is added to the cylinder line 89.
  • the valve 87 remains actuated and the non-return valve 86 closes, thereby blocking the oil in the line 89 and the cylinders 31.
  • the pressure in the line 89 remains substantially constant until the next charge of crop material has been fed to the baling chamber 18. However there may still be a small fall of cylinder pressure, following mainly from the relaxation of the crop package in the baling chamber 18.
  • Oil is added to the cylinders 31 until, at the end of the fixed interval, the by-pass valve 82 is deactivated and the oil pressure at the inlet port of the control valve 87 drops.
  • the non-return valve 86 closes and blocks the oil in the cylinders 31, thereby securing the position of the movable wall portion 30.
  • the introduction of a new charge of crop material causes at first an increase in bale chamber section during a first interval, followed by a decrease of the section during a second interval.
  • the resulting position of the movable wall portion 30 depends on the ratio between these two time intervals. The higher and wider the load peak sensed by the load sensor 75, the longer the first interval will be and the larger the bale chamber section will be. When the load peak is lower, the first interval will be shorter and more oil will be added to the cylinders 31, causing a decrease of the bale chamber section.
  • an equilibrium will be reached in which the amount of oil drained during each compression stroke is equal to the amount of oil added in between the compression strokes.
  • the density control system precludes a readjustment of the movable wall portion 30 in response to the loads sensed by the sensor 75: the load controlled steering signal from the Smartfet 101 is interrupted by the relay 103. Furthermore no pressurized oil is available at the inlet port of the control valve 87, as the by-pass valve 82 is not actuated.
  • the sensor switch 60 monitors the movement of a hay dog 47 installed above the baling chamber slot 40. This position has the advantage that the risk for contamination of the switch 60 by stray straw or hay particles is substantially less than below the slot 40.
  • the mechanical switch 60 may also be replaced with contactless sensors such as proximity switches or optical sensors. It is also conceivable to monitor the movement of another member which has been installed on one portion of a wall of the baling chamber 18 for the sole purpose of establishing the passage of a new charge of crop material therealong and which has no function in retaining the package during the reverse stroke of the plunger 24.

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Claims (18)

  1. Dichteregelsystem für eine landwirtschaftliche Ballenpresse (10), die Folgendes umfasst:
    eine Ballenpresskammer (18) mit einer Mehrzahl von Wänden (36-38), die zumindest einen beweglichen Wandabschnitt (30) einschließen, und
    Einrichtungen (20) zur Einführung von Ladungen aus Emtematerial in die Ballenpresskammer (18) und einen Presskolben (24) zum Komprimieren der Ladungen zu einem Packen aus Erntematerial in dieser,
    wobei das Dichteregelsystem Folgendes umfasst:
    Ladungsmesseinrichtungen (40, 60) zum Messen der Einführung einer neuen Ladung aus Emtematerial in die Ballenpresskammer (18) und zur Erzeugung eines Ausgangssignals, das diese Einführung anzeigt,
    Lastmesseinrichtungen (75/76) zum Messen der auf die Ladung während deren Komprimierung ausgeübten Last und zur Erzeugung eines Ausgangssignals, das diese Kraft anzeigt, und
    Betätigungseinrichtungen (87, 31) zur Einstellung der Position des beweglichen Wandabschnittes (30) in Abhängigkeit von dem Ausgangssignal der Lastmesseinrichtungen (75/76) und von dem Ausgangssignal der Ladungsmesseinrichtungen (44, 60), um die Dichte des Packens aus Emtematerial zu ändern,
       wobei das Dichteregelsystem dadurch gekennzeichnet ist, dass die Ladungsmesseinrichtungen (44, 60) betreibbar sind, um das Vorbeilaufen einer neu eingeführten Ladung aus Erntematerial entlang zumindest eines Wandteils (36) der Ballenkammer (18) zu messen.
  2. Dichteregelsystem nach Anspruch 1, dadurch gekennzeichnet, dass die Lastmesseinrichtungen (75/76) dem Antriebsstrang (29, 27, 26, 25, 76) des Presskolbens (24) zugeordnet sind und ein Ausgangssignal erzeugen, das die von dem Presskolben (24) ausgeübte Kraft anzeigt.
  3. Dichteregelsystem nach Anspruch 1, dadurch gekennzeichnet, dass die Lastmesseinrichtungen (75/76) einer Wand (36-38) der Ballenpresskammer (18) zugeordnet sind und ein Ausgangssignal erzeugen, das die von dem Packen auf die Wand (36-38) ausgeübte Kraft anzeigt.
  4. Dichteregelsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es weiterhin Einrichtungen (100, 103) umfasst, um eine Betätigung der Betätigungseinrichtungen (87, 31) auszuschließen, wenn die Ladungsmesseinrichtungen (44, 60) keinen Vorbeilauf einer neuen Ladung aus Erntematerial entlang des zumindest einen Wandteils (36) messen.
  5. Dichteregelsystem nach Anspruch 4, dadurch gekennzeichnet, dass die die Betätigung ausschließenden Einrichungen (100, 103) betreibbar sind, um jede Bewegung des beweglichen Wandabschnittes (30) auszuschließen, wenn die Ladungsmesseinrichtungen (44, 60) keinen Vorbeilauf einer neuen Ladung aus Erntematerial entlang des zumindest einen Wandteils (36) messen.
  6. Dichteregelsystem nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die die Betätigung ausschließenden Einrichtungen (100, 103) betreibbar sind, um die Betätigung der Betätigungseinrichtungen (87, 31) in Abhängigkeit von den Lastmesseinrichtungen (75/76) während eines festen Zeitintervalls freizugeben, nachdem die Ladungsmesseinrichtungen (44, 60) ein Vorbeilaufen einer neuen Ladung aus Emtematerial gemessen haben.
  7. Dichteregelsystem nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass:
    die Betätigungseinrichtungen (87, 31) zumindest ein hydraulisches Steuerventil (87) und zumindest einen hiermit verbundenen Hydraulikzylinder (31) umfassen, und
    die Einrichtungen (100, 103) zum Ausschließen der Betätigung Einrichtungen (103) zum Ausschließen der Betätigung des hydraulischen Steuerventils durch die Lastmesseinrichtungen (75/76) umfassen.
  8. Dichteregelsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es weiterhin Einrichtungen (100, 82) zur Freigabe der Betätigung der Betätigungseinrichtungen (87, 31) zur Vergrößerung der Dichte des Packens nur unter der Bedingung umfasst, dass die Ladungsmesseinrichtungen (64, 60) die Einführung einer neuen Ladung aus Erntematerial gemessen haben.
  9. Dichteregelsystem nach Anspruch 8, dadurch gekennzeichnet, dass die Freigabeeinrichtungen (100, 82) die Betätigung der Betätigungseinrichtungen (87, 31) zur Vergrößerung der Dichte des Packens während eines festen Zeitintervalls nach jeder Einführung einer neuen Ladung aus Erntematerial freigeben.
  10. Dichteregelsystem nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass:
    die Betätigungseinrichtungen (87, 31) zumindest ein erstes hydraulisches Steuerventil (87) und zumindest einen hiermit verbundenen Hydraulikzylinder (31) umfassen, und
    die Freigabeeinrichtungen (100, 82) zumindest ein zweites hydraulisches Steuerventil (82) umfassen, das betreibbar ist, um mit Druck beaufschlagtes Öl an das erste Steuerventil (87) zu liefern.
  11. Dichteregelsystem nach Anspruch 10 unter Rückbeziehung auf einen der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass die Freigabeeinrichtungen (100, 82) mit den die Betätigung ausschließenden Einrichtungen (100, 103) so verkettet sind, dass sie gleichzeitig unter Druck stehendes Öl an das erste Steuerventil (87) liefern und dessen Betätigung in Abhängigkeit von dem Ausgangssignal der Lastmesseinrichtungen (75/76) freigeben.
  12. Dichteregelsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ladungsmesseinrichtungen (44, 60) ein schwenkbares Bauteil (47), das durch den zumindest einen Wandteil (36) hindurch in die Bahn der Ladungen aus Erntematerial vorspringt, und einen Sensor (60) umfassen, der die Bewegung des schwenkbaren Bauteils (47) misst.
  13. Dichteregelsystem nach Anspruch 12, dadurch gekennzeichnet, dass das schwenkbare Bauteil (47) betreibbar ist, um zumindest einen Teil der Packung nach der Kompression durch den Presskolben (24) zurückzuhalten.
  14. Dichteregelsystem nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass das schwenkbare Bauteil (47) an einer Seitenwand (36) oder einer oberen Wand (38) der Ballenpresskammer befestigt ist.
  15. Verfahren zur Regelung der Dichte von Packen aus Emtematerial aus einer landwirtschaftlichen Ballenpresse 10, die Folgendes umfasst:
    eine Ballenpresskammer (18), die zumindest einen beweglichen Wandabschnitt (13) aufweist, und
    Einrichtungen (20) zur Einführung aufeinanderfolgender Ladungen aus Emtematerial in die Ballenpresskammer (18) zur Bildung eines Packens aus dem Erntematerial in dieser und einen Presskolben (24) zum Komprimieren der Ladungen zu einem Packen aus dem Emtematerial in dieser,
       wobei das Verfahren die folgenden Schritte in irgendeiner zweckmäßigen Reihenfolge umfasst:
    i) Überwachen der Einführung (110) einer Ladung aus Emtematerial in die Ballenpresskammer (18),
    ii) Überwachen der Last (112) auf den Presskolben (24) während der Komprimierung der Ladungen, und
    iii) Einstellen der Position des beweglichen Wandabschnittes (30) in Abhängigkeit von der Last auf den Presskolben (24) nur dann, wenn eine neue Ladung aus Erntematerial in die Ballenpresskammer (18) eingeführt wurde,
       wobei das Verfahren dadurch gekennzeichnet ist, dass der Schritt (i) der Überwachung der Einführung die Messung des Vorbeilaufens einer neu eingeführten Ladung aus Emtematerial entlang zumindest eines Wandabschnitts (36) der Ballenpresskammer (18) umfasst.
  16. Verfahren nach Anspruch 15, dadurch gekennzeichnet, dass der Schritt (i) der Überwachung der Einführung die Messung der Bewegung eines schwenkbaren Bauteils (47) umfasst, das durch den zumindest einen Wandteil (36) hindurch vorspringt.
  17. Verfahren nach Anspruch 15 oder 16, dadurch gekennzeichnet, dass der Einstellschritt (iii) das Ausschließen der Bewegung des beweglichen Wandabschnittes (30) umfasst, wenn kein Vorbeilaufen einer neu eingeführten Ladung aus Emtematerial entlang des zumindest einen Wandabschnittes (36) gemessen wird.
  18. Verfahren nach einem der Ansprüche 15 bis 17, dadurch gekennzeichnet, dass der Einstellschritt (iii) die Freigabe der Einstellung des beweglichen Wandabschnittes (30) zur Vergrößerung der Dichte des Packens während eines festen Zeitintervalls nach jeder Einführung einer neuen Ladung aus Erntematerial umfasst.
EP98203318A 1997-10-07 1998-10-01 Ballendichteregeleinrichtung für Ballenpresse Expired - Lifetime EP0908089B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9721106A GB2330110A (en) 1997-10-07 1997-10-07 Bale density control system for agricultural balers
GB9721106 1997-10-07
US09/165,560 US6026741A (en) 1997-10-07 1998-10-02 Bale density control system for agricultural balers

Publications (2)

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EP0908089A1 EP0908089A1 (de) 1999-04-14
EP0908089B1 true EP0908089B1 (de) 2002-08-28

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US6026741A (en) 2000-02-22
GB9721106D0 (en) 1997-12-03
GB2330110A (en) 1999-04-14
EP0908089A1 (de) 1999-04-14

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